/Engine/Plugins/Experimental/RemoteSession/Source/RemoteSession/Public/Channels/RemoteSessionARSystemChannel.h
Saves the AR world to a byte array using an async task
virtual [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FARSaveWorldAsyncTask](API\Runtime\AugmentedReality\FARSaveWorldAsyncTask), ESPMode::ThreadSafe > OnSaveWorld() const